import { constantRoutes } from '@/router'
//导入获取菜单数据的方法
import { getMenuList } from '@/api/user';
//导入Layout组件
import Layout from '@/layout'
/**
 * Use meta.role to determine if the current user has permission
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role))
  } else {
    return true
  }
}

/**
 * Filter asynchronous routing tables by recursion
 * @param routes asyncRoutes
 * @param roles
 */
export function filterAsyncRoutes(routes, roles) {
  const res = []

  routes.forEach(route => {
    const tmp = { ...route }
    if (hasPermission(roles, tmp)) {
      //获取组件
const component = tmp.component;
//判断该路由使用有组件
if(route.component){
//判断是否是根组件
if(component === 'Layout'){
tmp.component = Layout;
}else{
  //获取对应的具体的组件信息
tmp.component = (resolve) => require([`@/views${component}`],resolve)
}
}
//判断是否有子菜单
if (tmp.children) {
tmp.children = filterAsyncRoutes(tmp.children, roles)
}
      res.push(tmp)
    }
  })

  return res
}

const state = {
  routes: [],
  addRoutes: []
}

const mutations = {
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
}

const actions = {
  generateRoutes({ commit }, roles) {
    return new Promise((resolve,reject) => {
      getMenuList().then(res=>{
      let accessedRoutes;//存放对应权限的路由信息
    //如果状态码为200，则表示成功
      if(res.code === 200){
        accessedRoutes = filterAsyncRoutes(res.data, roles)
      }
    //将路由信息保存到store中
      commit("SET_ROUTES",accessedRoutes);
      resolve(accessedRoutes);
    }).catch(error=>{
      reject(error);
    });
    })
    }
    
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}
